<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      "use strict";
      function Fn() {
        // new1: let this = {}
        this.name = "jack";
        this.age = 20;
        // return this; // 隐式返回
      }

      console.log(new Fn()); // this
    </script>
  </body>
</html>
